lustre/include/linux/lustre_compat25.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef _LINUX_COMPAT25_H
  38 #define _LINUX_COMPAT25_H
  39
  40 #ifdef __KERNEL__
  41
  42 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
  43 #error sorry, lustre requires at least linux kernel 2.6.9 or later
  44 #endif
  45
  46 #include <libcfs/linux/portals_compat25.h>
  47
  48 #include <linux/lustre_patchless_compat.h>
  49
  50 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  51 struct ll_iattr {
  52         struct iattr    iattr;
  53         unsigned int    ia_attr_flags;
  54 };
  55 #else
  56 #define ll_iattr iattr
  57 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  58
  59 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  60                 struct dentry *dentry)
  61 {
  62         struct dentry *old_pwd;
  63         struct vfsmount *old_pwdmnt;
  64
  65         write_lock(&fs->lock);
  66         old_pwd = fs->pwd;
  67         old_pwdmnt = fs->pwdmnt;
  68         fs->pwdmnt = mntget(mnt);
  69         fs->pwd = dget(dentry);
  70         write_unlock(&fs->lock);
  71
  72         if (old_pwd) {
  73                 dput(old_pwd);
  74                 mntput(old_pwdmnt);
  75         }
  76 }
  77
  78 /*
  79  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
  80  * ATTR_* attributes (see bug 13828)
  81  */
  82 #define ATTR_BLOCKS    (1 << 27)
  83
  84 #if HAVE_INODE_I_MUTEX
  85 #define UNLOCK_INODE_MUTEX(inode) do {mutex_unlock(&(inode)->i_mutex); } while(0)
  86 #define LOCK_INODE_MUTEX(inode) do {mutex_lock(&(inode)->i_mutex); } while(0)
  87 #define LOCK_INODE_MUTEX_PARENT(inode) \
  88 do {mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
  89 #define TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
  90 #else
  91 #define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
  92 #define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
  93 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
  94 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
  95 #endif /* HAVE_INODE_I_MUTEX */
  96
  97 #ifdef HAVE_SEQ_LOCK
  98 #define LL_SEQ_LOCK(seq) mutex_lock(&(seq)->lock)
  99 #define LL_SEQ_UNLOCK(seq) mutex_unlock(&(seq)->lock)
 100 #else
 101 #define LL_SEQ_LOCK(seq) down(&(seq)->sem)
 102 #define LL_SEQ_UNLOCK(seq) up(&(seq)->sem)
 103 #endif
 104
 105 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 106 #define d_child d_u.d_child
 107 #define d_rcu d_u.d_rcu
 108 #endif
 109
 110 #ifdef HAVE_DQUOTOFF_MUTEX
 111 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
 112 #define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
 113 #else
 114 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
 115 #define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
 116 #endif /* HAVE_DQUOTOFF_MUTEX */
 117
 118 #define current_ngroups current->group_info->ngroups
 119 #define current_groups current->group_info->small_block
 120
 121 #ifndef page_private
 122 #define page_private(page) ((page)->private)
 123 #define set_page_private(page, v) ((page)->private = (v))
 124 #endif
 125
 126 #ifndef HAVE_GFP_T
 127 #define gfp_t int
 128 #endif
 129
 130 #define lock_dentry(___dentry)          spin_lock(&(___dentry)->d_lock)
 131 #define unlock_dentry(___dentry)        spin_unlock(&(___dentry)->d_lock)
 132
 133 #define ll_kernel_locked()      kernel_locked()
 134
 135 /*
 136  * OBD need working random driver, thus all our
 137  * initialization routines must be called after device
 138  * driver initialization
 139  */
 140 #ifndef MODULE
 141 #undef module_init
 142 #define module_init(a)     late_initcall(a)
 143 #endif
 144
 145 /* XXX our code should be using the 2.6 calls, not the other way around */
 146 #define TryLockPage(page)               TestSetPageLocked(page)
 147 #define Page_Uptodate(page)             PageUptodate(page)
 148 #define ll_redirty_page(page)           set_page_dirty(page)
 149
 150 #define KDEVT_INIT(val)                 (val)
 151
 152 #define LTIME_S(time)                   (time.tv_sec)
 153 #define ll_path_lookup                  path_lookup
 154 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 155
 156 #define ll_pgcache_lock(mapping)          spin_lock(&mapping->page_lock)
 157 #define ll_pgcache_unlock(mapping)        spin_unlock(&mapping->page_lock)
 158 #define ll_call_writepage(inode, page)  \
 159                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 160 #define ll_invalidate_inode_pages(inode) \
 161                                 invalidate_inode_pages((inode)->i_mapping)
 162 #define ll_truncate_complete_page(page) \
 163                                 truncate_complete_page(page->mapping, page)
 164
 165 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 166 #define ll_dev_t                        dev_t
 167 #define kdev_t                          dev_t
 168 #define to_kdev_t(dev)                  (dev)
 169 #define kdev_t_to_nr(dev)               (dev)
 170 #define val_to_kdev(dev)                (dev)
 171 #define ILOOKUP(sb, ino, test, data)    ilookup5(sb, ino, test, data);
 172
 173 #include <linux/writeback.h>
 174
 175 static inline int cleanup_group_info(void)
 176 {
 177         struct group_info *ginfo;
 178
 179         ginfo = groups_alloc(0);
 180         if (!ginfo)
 181                 return -ENOMEM;
 182
 183         set_current_groups(ginfo);
 184         put_group_info(ginfo);
 185
 186         return 0;
 187 }
 188
 189 #define __set_page_ll_data(page, llap) \
 190         do {       \
 191                 page_cache_get(page); \
 192                 SetPagePrivate(page); \
 193                 set_page_private(page, (unsigned long)llap); \
 194         } while (0)
 195 #define __clear_page_ll_data(page) \
 196         do {       \
 197                 ClearPagePrivate(page); \
 198                 set_page_private(page, 0); \
 199                 page_cache_release(page); \
 200         } while(0)
 201
 202 #define kiobuf bio
 203
 204 #include <linux/proc_fs.h>
 205
 206 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 207 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 208 extern void __d_rehash(struct dentry *dentry, int lock);
 209 #endif
 210
 211 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 212 #define d_move_locked(dentry, target) __d_move(dentry, target)
 213 extern void __d_move(struct dentry *dentry, struct dentry *target);
 214 #endif
 215
 216 #ifdef HAVE_CAN_SLEEP_ARG
 217 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 218         flock_lock_file_wait(file, lock, can_sleep)
 219 #else
 220 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 221         flock_lock_file_wait(file, lock)
 222 #endif
 223
 224 #define CheckWriteback(page, cmd) \
 225         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 226          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 227
 228 #ifdef HAVE_PAGE_LIST
 229 static inline int mapping_has_pages(struct address_space *mapping)
 230 {
 231         int rc = 1;
 232
 233         ll_pgcache_lock(mapping);
 234         if (list_empty(&mapping->dirty_pages) &&
 235             list_empty(&mapping->clean_pages) &&
 236             list_empty(&mapping->locked_pages)) {
 237                 rc = 0;
 238         }
 239         ll_pgcache_unlock(mapping);
 240
 241         return rc;
 242 }
 243 #else
 244 static inline int mapping_has_pages(struct address_space *mapping)
 245 {
 246         return mapping->nrpages > 0;
 247 }
 248 #endif
 249
 250 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 251 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 252 #else
 253 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 254 #endif
 255
 256 #ifdef HAVE_SECURITY_PLUG
 257 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 258                 vfs_symlink(dir, dentry, mnt, path, mode)
 259 #else
 260 #ifdef HAVE_4ARGS_VFS_SYMLINK
 261 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 262                 vfs_symlink(dir, dentry, path, mode)
 263 #else
 264 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 265                        vfs_symlink(dir, dentry, path)
 266 #endif
 267 #endif
 268
 269 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
 270 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
 271 #else
 272 #define ll_set_dflags(dentry, flags) do { \
 273                 spin_lock(&dentry->d_lock); \
 274                 dentry->d_flags |= flags; \
 275                 spin_unlock(&dentry->d_lock); \
 276         } while(0)
 277 #endif
 278
 279 #ifndef container_of
 280 #define container_of(ptr, type, member) ({                      \
 281                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 282                 (type *)( (char *)__mptr - offsetof(type,member) );})
 283 #endif
 284
 285 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 286 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 287 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 288
 289 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 290 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 291 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 292
 293 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 294 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 295 #endif
 296
 297 #include <linux/mpage.h>        /* for generic_writepages */
 298 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 299 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 300 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 301                                            loff_t start, loff_t end)
 302 {
 303         int rc;
 304         struct writeback_control wbc = {
 305                 .sync_mode = WB_SYNC_ALL,
 306                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 307         };
 308
 309 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 310         wbc.range_start = start;
 311         wbc.range_end = end;
 312 #else
 313         wbc.start = start;
 314         wbc.end = end;
 315 #endif
 316
 317 #ifdef mapping_cap_writeback_dirty
 318         if (!mapping_cap_writeback_dirty(mapping))
 319                 rc = 0;
 320 #else
 321         if (mapping->backing_dev_info->memory_backed)
 322                 rc = 0;
 323 #endif
 324         /* do_writepages() */
 325         else if (mapping->a_ops->writepages)
 326                 rc = mapping->a_ops->writepages(mapping, &wbc);
 327         else
 328                 rc = generic_writepages(mapping, &wbc);
 329         return rc;
 330 }
 331 #else
 332 int filemap_fdatawrite_range(struct address_space *mapping,
 333                              loff_t start, loff_t end);
 334 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 335
 336 #ifdef HAVE_VFS_KERN_MOUNT
 337 static inline struct vfsmount *
 338 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 339 {
 340         struct file_system_type *type = get_fs_type(fstype);
 341         struct vfsmount *mnt;
 342         if (!type)
 343                 return ERR_PTR(-ENODEV);
 344         mnt = vfs_kern_mount(type, flags, name, data);
 345         module_put(type->owner);
 346         return mnt;
 347 }
 348 #else
 349 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 350 #endif
 351
 352 #ifdef HAVE_STATFS_DENTRY_PARAM
 353 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 354 #else
 355 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 356 #endif
 357
 358 #ifndef HAVE_SB_TIME_GRAN
 359 #ifndef HAVE_S_TIME_GRAN
 360 #error Need s_time_gran patch!
 361 #endif
 362 static inline u32 get_sb_time_gran(struct super_block *sb)
 363 {
 364         return sb->s_time_gran;
 365 }
 366 #endif
 367
 368 #ifdef HAVE_RW_TREE_LOCK
 369 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 370 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 371 #else
 372 #define TREE_READ_LOCK_IRQ(mapping) spin_lock_irq(&(mapping)->tree_lock)
 373 #define TREE_READ_UNLOCK_IRQ(mapping) spin_unlock_irq(&(mapping)->tree_lock)
 374 #endif
 375
 376 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 377 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 378 #else
 379 static inline
 380 int ll_unregister_blkdev(unsigned int dev, const char *name)
 381 {
 382         unregister_blkdev(dev, name);
 383         return 0;
 384 }
 385 #endif
 386
 387 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 388 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 389 #else
 390 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 391 #endif
 392
 393 #ifdef HAVE_INODE_BLKSIZE
 394 #define ll_inode_blksize(a)     (a)->i_blksize
 395 #else
 396 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 397 #endif
 398
 399 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 400 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 401 #else
 402 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 403 #endif
 404
 405 /* add a lustre compatible layer for crypto API */
 406 #include <linux/crypto.h>
 407 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 408 #define ll_crypto_hash          crypto_hash
 409 #define ll_crypto_cipher        crypto_blkcipher
 410 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 411 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 412 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 413 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 414 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 415 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 416                 crypto_alloc_blkcipher(name ,type, mask)
 417 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 418                 crypto_blkcipher_setkey(tfm, key, keylen)
 419 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 420                 crypto_blkcipher_set_iv(tfm, src, len)
 421 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 422                 crypto_blkcipher_get_iv(tfm, dst, len)
 423 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 424                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 425 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 426                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 427 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 428                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 429 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 430                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 431
 432 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 433                                  u8 *key, unsigned int *keylen,
 434                                  struct scatterlist *sg,
 435                                  unsigned int size, u8 *result)
 436 {
 437         struct hash_desc desc;
 438         int              rv;
 439         desc.tfm   = tfm;
 440         desc.flags = 0;
 441         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 442         if (rv) {
 443                 CERROR("failed to hash setkey: %d\n", rv);
 444                 return rv;
 445         }
 446         return crypto_hash_digest(&desc, sg, size, result);
 447 }
 448 static inline
 449 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 450 {
 451         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 452 }
 453 static inline
 454 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 455 {
 456         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 457 }
 458
 459 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 460 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 461 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 462 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 463 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 464 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 465 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 466 #include <linux/scatterlist.h>
 467 #define ll_crypto_hash          crypto_tfm
 468 #define ll_crypto_cipher        crypto_tfm
 469 #ifndef HAVE_STRUCT_HASH_DESC
 470 struct hash_desc {
 471         struct ll_crypto_hash *tfm;
 472         u32                    flags;
 473 };
 474 #endif
 475 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 476 struct blkcipher_desc {
 477         struct ll_crypto_cipher *tfm;
 478         void                    *info;
 479         u32                      flags;
 480 };
 481 #endif
 482 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 483         crypto_cipher_setkey(tfm, key, keylen)
 484 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 485         crypto_cipher_set_iv(tfm, src, len)
 486 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 487         crypto_cipher_get_iv(tfm, dst, len)
 488 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 489         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 490 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 491         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 492 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 493         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 494 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 495         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 496
 497 static inline
 498 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 499                                                    u32 type, u32 mask)
 500 {
 501         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 502         const char *pan = algname;
 503         u32         flag = 0;
 504
 505         if (strncmp("cbc(", algname, 4) == 0)
 506                 flag |= CRYPTO_TFM_MODE_CBC;
 507         else if (strncmp("ecb(", algname, 4) == 0)
 508                 flag |= CRYPTO_TFM_MODE_ECB;
 509         if (flag) {
 510                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 511                 if (vp) {
 512                         memcpy(buf, algname + 4, vp - algname - 4);
 513                         buf[vp - algname - 4] = '\0';
 514                         pan = buf;
 515                 } else {
 516                         flag = 0;
 517                 }
 518         }
 519         return crypto_alloc_tfm(pan, flag);
 520 }
 521
 522 static inline
 523 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 524 {
 525         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 526         const char *pan = alg;
 527
 528         if (strncmp("hmac(", alg, 5) == 0) {
 529                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 530                 if (vp) {
 531                         memcpy(buf, alg+ 5, vp - alg- 5);
 532                         buf[vp - alg - 5] = 0x00;
 533                         pan = buf;
 534                 }
 535         }
 536         return crypto_alloc_tfm(pan, 0);
 537 }
 538 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 539 {
 540        crypto_digest_init(desc->tfm); return 0;
 541 }
 542 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 543                                         struct scatterlist *sg,
 544                                         unsigned int nbytes)
 545 {
 546         struct scatterlist *sl = sg;
 547         unsigned int        count;
 548                 /*
 549                  * This way is very weakness. We must ensure that
 550                  * the sum of sg[0..i]->length isn't greater than nbytes.
 551                  * In the upstream kernel the crypto_hash_update() also
 552                  * via the nbytes computed the count of sg[...].
 553                  * The old style is more safely. but it gone.
 554                  */
 555         for (count = 0; nbytes > 0; count ++, sl ++) {
 556                 nbytes -= sl->length;
 557         }
 558         crypto_digest_update(desc->tfm, sg, count); return 0;
 559 }
 560 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 561 {
 562         crypto_digest_final(desc->tfm, out); return 0;
 563 }
 564 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 565                                  u8 *key, unsigned int *keylen,
 566                                  struct scatterlist *sg,
 567                                  unsigned int nbytes,
 568                                  u8 *out)
 569 {
 570         struct scatterlist *sl = sg;
 571         int                 count;
 572         for (count = 0; nbytes > 0; count ++, sl ++) {
 573                 nbytes -= sl->length;
 574         }
 575         crypto_hmac(tfm, key, keylen, sg, count, out);
 576         return 0;
 577 }
 578
 579 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 580 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 581 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 582 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 583 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 584 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 585 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 586 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 587 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 588 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 589
 590 #ifndef HAVE_SYNCHRONIZE_RCU
 591 #define synchronize_rcu() synchronize_kernel()
 592 #endif
 593
 594 #ifdef HAVE_SECURITY_PLUG
 595 #define ll_remove_suid(inode,mnt)               remove_suid(inode,mnt)
 596 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 597 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 598 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 599 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 600 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 601                 vfs_mknod(dir,entry,mnt,mode,dev)
 602 #define ll_security_inode_unlink(dir,entry,mnt)         \
 603                 security_inode_unlink(dir,entry,mnt)
 604 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 605                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 606 #else
 607 #define ll_remove_suid(inode,mnt)               remove_suid(inode)
 608 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 609 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 610 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 611 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 612 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 613 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 614 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 615                 vfs_rename(old,old_dir,new,new_dir)
 616 #endif /* HAVE_SECURITY_PLUG */
 617
 618 #ifndef for_each_possible_cpu
 619 #define for_each_possible_cpu(i) for_each_cpu(i)
 620 #endif
 621
 622 #ifndef cpu_to_node
 623 #define cpu_to_node(cpu)         0
 624 #endif
 625
 626 #ifndef abs
 627 static inline int abs(int x)
 628 {
 629         return (x < 0) ? -x : x;
 630 }
 631 #endif
 632
 633 #ifndef labs
 634 static inline long labs(long x)
 635 {
 636         return (x < 0) ? -x : x;
 637 }
 638 #endif /* HAVE_REGISTER_SHRINKER */
 639
 640 /* Using kernel fls(). Userspace will use one defined in user-bitops.h. */
 641 #ifndef __fls
 642 #define __fls fls
 643 #endif
 644
 645 #ifdef HAVE_INVALIDATE_INODE_PAGES
 646 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 647 #endif
 648
 649 #ifdef HAVE_INODE_IPRIVATE
 650 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 651 #else
 652 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 653 #endif
 654
 655 #ifndef SLAB_DESTROY_BY_RCU
 656 #define SLAB_DESTROY_BY_RCU 0
 657 #endif
 658
 659 #ifdef HAVE_VFS_RENAME_MUTEX
 660 #define VFS_RENAME_LOCK(inode) mutex_lock(&((inode)->i_sb->s_vfs_rename_mutex))
 661 #define VFS_RENAME_UNLOCK(inode) mutex_unlock(&((inode)->i_sb->s_vfs_rename_mutex))
 662 #else
 663 #define VFS_RENAME_LOCK(inode) down(&((inode)->i_sb->s_vfs_rename_sem))
 664 #define VFS_RENAME_UNLOCK(inode) up(&((inode)->i_sb->s_vfs_rename_sem))
 665 #endif
 666
 667 #endif /* __KERNEL__ */
 668 #endif /* _COMPAT25_H */